Friends who go DEEP, in more ways that one ;) Bestie with benefits, but to everyone else's knowledge we're "only friends"
"Yea, Me and ______ are deep friends "

Spectator #1 "So they are just "friends", huh?"
Spectator #2 "My thoughts exactly, they totally go DEEP"
Spectator #1 "Mhhmm, best friends. DEEP FRIENDS I would say!"
by waiizofsamuri July 23, 2015
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Deep-friending: to friend someone on facebook as a means for something deeper than just friendship. i.e. gathering information, viewing pictures, stalking in general.
Guy 1: So my girlfriend just called me out on all these pictures that were posted of me on facebook, but i coulda sworn she couldn't see them.

Guy 2: Dude, she's Deep-Friending the shit out of you. Soon your mutual friends will be your entire friends list man. Run.
by TastesLikeLemons57 November 10, 2010
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When a person accepts a shit into his or her mouth from another, usually a close friend.
Those two guys were really close, did you know they gave each other deep friend mars bars for christmas?
by Willy Wanker III January 10, 2011
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